Keyword → memory stocks

SK Hynix Falls 15.4% in Record Seoul Plunge — KOSPI Triggers 7th Circuit Breaker of 2026 as AI Memory Unwind Spreads to US Premarket

SK Hynix shares fell 15.4% in Seoul — their worst single-session decline on record — dragging the KOSPI down 8.95% and triggering a 20-minute market-wide circuit breaker, the seventh of 2026. The rout came just one day after SK Hynix's $26.5 billion US ADR debut, as arbitrage selling, a downgraded Q2 profit forecast from Korea Investment & Securities, and renewed US-Iran tensions converged. Micron Technology and the VanEck Semiconductor ETF are both lower in US premarket trading.

Bullish Memory Chip Stocks Lead S&P 500 Performers Amid AI Boom

Memory-focused companies such as Sandisk, Western Digital, and Seagate showed significant gains in U.S. markets as AI-driven demand continues to reshape sector valuations. Investors are reallocating capital toward memory and semiconductor stocks benefiting from heightened data center and AI hardware needs, even as broader market performance was mixed.